期刊
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 270, 期 1520, 页码 1193-1202出版社
ROYAL SOC
DOI: 10.1098/rspb.2003.2333
关键词
phylogeny; introgression; species; gene trees; multilocus; Drosophila
资金
- NIGMS NIH HHS [GM58060] Funding Source: Medline
Bifurcating phylogenies are frequently used to describe the evolutionary history of groups of related species. However, simple bifurcating models may poorly represent the evolutionary history of species that have been exchanging genes. Here, we show that the history of three well-known closely related species, Drosophila pseudoobscura, D. persimilis and D. p. bogotana, is not well represented by a bifurcating phylogenetic tree. The phylogenetic relationships among these species vary widely between different genomic regions. Much of this phylogenetic variation can be explained by the potential of different genomic regions to introgress between species, as measured in laboratory studies. We argue that the utility of multiple markers in species-level phylogenetic studies can be greatly enhanced by knowledge of genomic location and, in the case of hybridizing species, by knowledge of the functional or linkage relationships among the markers and regions of the genome that reduce hybrid fitness.
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